Adding images to scraping data (#157)

* Fredy now supports pulling the main Image from the listing and send it together with the usual information

lib/provider/wgGesucht.js

@@ -5,7 +5,8 @@ let appliedBlackList = [];
 function normalize(o) {
   const id = buildHash(o.id, o.price);
   const link = `https://www.wg-gesucht.de${o.link}`;
-  return Object.assign(o, { id, link });
+  const image = o.image != null ? o.image.replace('small', 'large') : null;
+  return Object.assign(o, { id, link, image });
 }
 
 function applyBlacklist(o) {
@@ -26,6 +27,7 @@ const config = {
     size: '.middle .text-right |removeNewline |trim',
     title: '.truncate_title a |removeNewline |trim',
     link: '.truncate_title a@href',
+    image: '.img-responsive@src',
   },
   normalize: normalize,
   filter: applyBlacklist,